Rotary pump



April 7, 1931. D NMEYER 1,799,287

ROTARY PUMP Filed May 14, 1928 W/MEME;

I Min 72F Patented Apr. 7, 1931 PATENT OFFICE HOMER DAUBENMEYER, OF DETROIT, MICHIGAN ROTARY PUMP Application. filed May 14, 1928. Serial No. 277,677;

This invention relates to improvements in rotary pumps and-provides a simplified construction using a minimum number of parts which are adaptable to quality and quantity production, said parts when rotating require a minimum movement thereby reducing friction,'promoting operating efliciency and prolonging the useful life of the mechanism.

Figure 1 is an elevation view of a rotary l0 pump constructed in accordance with my invention.

Figure 2 is an end viets with thetcoverlremoved showing the rotating members.

Figure 3 is a sectional view taken on the plane indicated by the line 33 in Figure 2 as shown by the arrows.

Referring to th drawings wherein like reference characters indicate like parts there is illustrated a housing 1 having an inlet port 6'and an outlet port 7, a projecting hub bored to take the crank shaft 3, a diameter bored to take'the rotor-5, a cross hole bored to take the projecting diameter of the oscillator 2, all of which are mountedon a suitable base.

The cover 4 has a projecting hub bored to take the crankshaft 3, a cross hole bored to take the projecting diameter of the oscillator 2,2111 of Which are suitably fastened by screws 8 to housing 1. The crankshaft 3 has a throw one half ofthe difierence in diameters be tween the housing 1 and the rotor 5 and is mounted free to revolve in housing 1 and cover 4.

The rotor 5 has a hole concentrically bored to take the crankshaft 3 and is free to re volvethereon and a radial slot to take the oscillator 2 with suitable clearance to slide when revolving The oscillator has two projecting diameters mounted in housing 1 and cover 4 and is free to move like a pendulum and its body extends into rotor 5 thereby separating the inlet from the outlet ports. In operation the crankshaft revolving changes the tangent location of the diameters I this movement increases and decreases the volume on either side of the oscillator and produces a rotary pumping action which exhausts 100 percent due to the novel design of the radii of the housing, rotor and oscillator respectively, which function without clearance. V

I desire to state that this construction can be varied without departing from the principle of a combined revolving and oscillating movement and this description does not limit in any respect the essentials and principles of this invention.

I claim:

In a rotary pump, the combination of a circular housing, of a crankshaft mounted conc'entrically through said housing and a radially seated oscillator pivoted tangentially through said housing and forming a dividing wall between inlet and outlet ports, a rotor mounted on said crankshaft free to oscillate, said rotorhaving a radialslot to receive said oscillator, all of which cooperates in rotation without clearance.

' HOMER DAUBENMEYER. 

